JPH09113839A - Display device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set a visual field angle widely and to enable a meter display on a fluorescent display tube to be viewed at a glance during a vehicle travel by reflecting the meter display by a reflecting mirror and imaging it as a virtual image at a distant position. SOLUTION: The fluorescent display 10 is stored below the meter hood of an instrument panel 2. A front cover 12 is arranged as the reflecting mirror below the vehicle display 10. The meter display on the fluorescent display tube 11 is reflected by the front cover 12 to exchange the upside and downside direction and imaged as the virtual image 4 at the distant position. Consequently, a sufficient visual field angle is secured and specific enlargement power is obtained. Then a navigation screen which is displayed on a liquid crystal display 13 is enlarged by a Fresnel lens 26 and the image formation position of its virtual image 27 becomes farther than the position of the virtual image 4 of the fluorescent display tube 11. Consequently, the navigation screen is displayed large and roads on a map can be viewed in detail.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular display device in which a navigation display device is added to a meter portion provided mainly on a vehicle instrument panel.

[0002]

2. Description of the Related Art As a conventional vehicle display device of this type, for example, one shown in FIG. 9 is known.

In such a device, the vehicle display device 1 for displaying a meter of vehicle speed, engine speed, etc.
It is stored inside the instrument panel 2. A reflection mirror 3 is arranged below the vehicle display device 1.

The meter display image of the vehicular display device 1 is reflected by the reflection mirror 3 and a virtual image 4 is formed at the position of the broken line and is displayed at a distance. For this reason, even if the driver of the vehicle shifts his or her line of sight from the outside scenery seen through the window glass to the meter display that is seen by being reflected by the reflection mirror 3, the meter is placed directly on the reflection mirror 3 portion. Since it is longer than the one installed and is closer to the outside scenery, the visibility of the meter display is good.

Further, as another conventional vehicle display device, there is known one as described in Japanese Utility Model Laid-Open No. 6-86198 shown in FIGS. 10 and 11.

In such a device, liquid crystal display devices 5 and 5 are provided on the front surface of the instrument panel 2, and in a normal state, the meter display is performed as shown in FIG. 10 and when the vehicle is stopped. When the current position information is needed, the navigation display can be switched as shown in FIG.

[0007]

However, as shown in FIG.
In the conventional vehicular display device shown in FIG. 11, since the liquid crystal display devices 5 and 5 are disposed on the front surface of the instrument panel 2, the liquid crystal display device can be seen from the outside view seen through the window glass. When the line of sight is moved to the meter display or the navigation display displayed in 5 and 5, the focal length is sharply shortened, it takes time to adjust the focus, and it is difficult to visually recognize the display.

Therefore, the vehicle display device 1 shown in FIG.
It is conceivable to dispose the liquid crystal display devices 5 and 5 at the position where is arranged to display the meter display or the navigation display from a distance. However, since the meter display can be visually recognized in an instant while the vehicle is traveling, We want to display it with sufficient brightness so that you can see it from any angle near your hand.

On the other hand, the navigation display is desired to be large because it is desired to visually recognize the road on a fine map in detail.
In addition, compared to the meter display, the position is confirmed by comparing it with the outside scenery seen through the window glass several times. Therefore, the farther the image forming position of the virtual image 4 is, the more the position of the virtual image 4 is displayed. Compared with the case, there is a different demand that the focus movement time be further shortened to facilitate the focus adjustment. Among these, in order to solve the request for the navigation display, the arrangement positions of the liquid crystal display devices 5 and 5 may be shifted further upward and a large screen may be used. There is a restriction on the shape of the instrument panel 2 that covers.

For this reason, a method of enlarging the reflection mirror 3 by forming a curve may be considered. However, this method causes a large distortion at the periphery and limits the magnification, and when performing meter display. However, there is a problem that the viewing angle is narrowed and the requirement peculiar to the meter display, which must be seen from any angle, cannot be satisfied.

Therefore, according to the present invention, the driver of the vehicle, regardless of whether the meter display or the navigation display is performed,
An object of the present invention is to provide a vehicular display device capable of visually recognizing these displays in a good state.

[0012]

In order to solve the above-mentioned problems, according to a first aspect of the present invention, a reflecting mirror having transmissivity and a reflecting mirror disposed above the reflecting mirror are provided. A fluorescent display tube that forms a virtual image at a distant position by reflecting the meter display on the display, a navigation display device that is disposed on the back side of the reflecting mirror and displays a navigation screen, the navigation display device, and The display device for a vehicle is characterized by having an optical system which is provided between the reflecting mirrors and which enlarges the navigation screen and sets the virtual image forming position to a position farther than the virtual image position of the fluorescent display tube.

According to the present invention having the above-mentioned structure, the meter display of the fluorescent display tube is reflected by the reflecting mirror and formed as a virtual image at a distant position. For this reason, it is possible to display a wide viewing angle near the hand with sufficient brightness so that it can be seen from any angle, and the meter display can be visually recognized in an instant while the vehicle is traveling.

The navigation screen displayed on the navigation display device is enlarged by the optical system, and the virtual image forming position is located farther than the virtual image position of the fluorescent display tube. Therefore, the navigation screen can be displayed in a large size, and the road on the fine map can be visually recognized in detail. Moreover, the image formation position of the virtual image can be set independently in the distance, and by setting the focal length close to the outside scenery, you can compare the outside scenery seen through the window glass and check the position several times. However, the focus adjustment is easy and the visibility is good.

Therefore, regardless of whether the meter display or the navigation display is performed, the driver of the vehicle can visually recognize these displays in good condition.

Further, according to a second aspect of the present invention, the tachometer display of the meter display by the fluorescent display tube and the navigation screen display by the navigation display device are switched to each other in the same area of the reflecting mirror. The vehicle display device according to claim 1 for displaying is characterized.

According to the second aspect of the present invention, the tachometer display and the navigation screen display by the navigation display device among the meter displays by the fluorescent display tube are provided in the same area of the reflecting mirror. It is switched and displayed.

Therefore, the area of the reflecting mirror can be effectively used to efficiently view these displays.

According to the third aspect,
The vehicle display device according to claim 1 or 2, wherein the optical system includes a Fresnel lens.

According to the third aspect of the present invention configured as above, since the Fresnel lens is used in the optical system, the navigation screen can be enlarged and displayed with little distortion.

The vehicle according to any one of claims 1 to 3, wherein the optical system is provided with a back-side reflecting mirror capable of changing an arrangement angle of the navigation display device. It features a display device.

According to the present invention having the above-mentioned structure, since the rear surface side reflecting mirror for changing the arrangement angle of the navigation display device is provided in the optical system,
It is possible to set the position of the navigation display device to an upper position with good space efficiency.

Further, in the optical system according to the fifth aspect of the present invention, the arrangement angle of the navigation display device can be changed in the optical system so that the virtual image forming position is located farther than the virtual image position of the fluorescent display tube. The vehicle display device according to any one of claims 1 to 4, wherein the magnifying reflecting mirror is provided.

According to a fifth aspect of the present invention configured in this way, the position and angle of the navigation display device can be changed so that the virtual image forming position is higher than the virtual image position of the fluorescent display tube. The magnifying mirror at a distant position
Since it is provided in the optical system, the position of the navigation display device has good space efficiency, for example, the magnifying lens is omitted while setting the position to the upper position to further improve the space efficiency. You can

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1 of the present invention will be described below with reference to the drawings. The same or equivalent parts as those in the conventional example are denoted by the same reference numerals and described.

1 to 6 show the first embodiment of the present invention.
The fluorescent display device 10 for displaying the vehicle speed, the engine speed, and the like in a meter is housed under the meter hood of the instrument panel 2. On the lower surface side of the fluorescent display device 10, a fluorescent display tube (VFD) for individually performing fluorescent display on the left and right sides as a meter display image of vehicle speed and engine rotation as shown in FIG.
11 is buried.

At the lower position of the vehicle display device 10,
A front cover 12 as a reflecting mirror is provided.
The front cover 12 is a smoked glass having transparency, is formed in a concave shape, and is normally configured so that the back side cannot be seen.

The meter display image of the fluorescent display device 10 disposed above the front cover 12 is reflected by the front cover 12 and a virtual image 4 is formed at the position shown by the arrow in FIG. It is configured to be displayed at a predetermined magnification at the position.

A main meter (not shown) is arranged on the back side of the front cover 12 so that the main display is used together with the meter display of the vehicle display device 10.

On the back side of the front cover 12, a liquid crystal display device 13 as a navigation display device for displaying a navigation screen on the right side of the front cover 12 is provided. The liquid crystal display device 13 is arranged inside a storage case 14 having a concave cross section. The liquid crystal display device 13 is connected to the display control unit 15 shown in FIG. 6 together with the fluorescent display device 10.

A gyro 16 is provided in the display controller 15.
Further, a navigation system 18 which is connected to the sanitary antenna 17 and constitutes a navigation display screen is provided. In addition, in the display control unit 15, the vehicle speed sensor 1
9 and an engine speed sensor 20, the fluorescent display device 10 is configured to perform meter display for displaying the vehicle speed and the engine speed.

Of these, the engine speed display of the fluorescent display device 10 and the navigation display and TV display of the liquid crystal display device 13 include an octopus display selection button 22, a navigation display selection button 23, provided on the steering wheel 21. It is configured to be selectively selected by the TV display selection button 24, and to be switched and displayed on the right side of the front cover 12 by the switching control unit 25 in the display control unit 15.

The navigation screen is enlarged between the liquid crystal display device 13 and the front cover 12, and the image forming position of the virtual image 27 is set at the fluorescent display tube 1.
A Fresnel lens 26 as an optical system is provided at a position farther than the position of the virtual image 4 of 1.

The Fresnel lens 26 is constructed so that the navigation screen can be enlarged and displayed with little distortion.

Next, the operation of the first embodiment will be described.

When the tacho display selection button 22 provided on the steering wheel 21 is pressed, the switching control section 25 of the display control section 15 causes the fluorescent display tube 11 shown in FIG.
At the same time as the vehicle speed display, the tachometer display that displays the engine speed also illuminates with fluorescence.

The meter display of the fluorescent display tube 11 is reflected by the front cover 12, switched up and down, and formed as a virtual image 4 at a position farther than the main meter installation position. FIG. 4 shows a state in which a tachometer display is projected on the front cover 12 at the same time as the vehicle speed display as the meter display, as viewed from the vehicle interior side. For this reason, it is possible to display a wide viewing angle near the hand with sufficient brightness so that it can be seen from any angle, and the meter display can be visually recognized in an instant while the vehicle is traveling.

Further, even if the driver of the vehicle shifts his or her line of sight from the outside scenery seen through the window glass to the meter display which is seen by being reflected by the front cover 12, the meter is located in the front cover 12 portion. Since it is longer than that directly arranged and is closer to the distance to the outside scenery, the focus moving time is short and the visibility of the meter display is good. In addition, the meter display of the fluorescent display tube 11 is clear, and compared to a liquid crystal display in which the arc portion is discontinuous (jagged), for example, the contrast can be continuously (smoothly) provided, and further visible. Good property.

Next, when the navigation display selection button 23 provided on the steering wheel 21 is pressed, the switching control unit 25 of the display control unit 15 displays only the vehicle speed display of the fluorescent display tube 11 shown in FIG. Fluorescent lighting.

The meter display of the fluorescent display tube 11 is reflected by the front cover 12 so that the vertical direction is switched and the virtual image 4 is formed at a distant position. For this reason, a sufficient viewing angle can be secured and a predetermined enlargement ratio can be obtained, so that the vehicle speed can be visually recognized in an instant from any direction.

In addition, in the switching control section 25 of the display control section 15, when the navigation display selection button 23 is selected, at the same time, a navigation image formed by the navigation system 18 is displayed on the liquid crystal display device 13.
To be displayed.

The navigation screen displayed on the liquid crystal display device 13 is enlarged by the Fresnel lens 26 and the virtual image 27 is formed at a position farther than the virtual image 4 position on the fluorescent display tube 11 as shown in FIG. The position.
Therefore, the navigation screen is displayed in a large size, and the road on the fine map can be visually recognized in detail. Moreover, virtual image 2
The image forming position of 7 can be set independently in the distance, and by setting the focal length close to the outside scenery, you can compare the outside scenery seen through the window glass and check the position several times. However, since the focus moving time is further shortened, the focus adjustment is facilitated and the visibility is good.

On the instrument panel 2,
Since the line-of-sight movement angle is smaller than that of the liquid crystal display device 13 in the center console, the visibility is good in this respect as well, and in addition to the audio etc. on the instrument panel 2 and the center console. A space for arranging the equipment can be formed, and the space efficiency is good.

Conventionally, at the same magnification as the meter display,
Since the magnification of the virtual image 27 of the navigation display, which could not be set to a high magnification due to the narrowing of the viewing angle of the meter display, etc., can be set independently, it can be enlarged to a size that is easy to visually recognize and on a fine map. Can read roads and letters.

FIG. 5 is a view from the inside of the vehicle showing a vehicle speed display as a meter display on the left side when facing the front of the front cover 12, and a navigation display transparently displayed on the right side when facing the front of the front cover 12. It is a thing.

Further, in the first embodiment, when the TV display selection button is selected and pressed, the vehicle speed display is displayed as the meter display on the left side in front of the front cover 12, and the received TV screen is displayed. The image can be displayed on the liquid crystal display device 13 and transmitted to the right side of the front of the front cover 12 for enlarged display.

Therefore, regardless of whether the meter display, the navigation display or the TV display is performed, the driver of the vehicle can visually recognize these displays in good condition.
Less eye fatigue and improved safety.

In the first embodiment, in the same area on the right side of the front cover 12 facing the front, tachometer display among the meter displays by the fluorescent display tube 11 and navigation of the navigation screen by the liquid crystal display device 13 are performed. The display is switched and displayed.

Therefore, the area of the front cover 12 can be effectively used to efficiently view these displays. In particular, since the navigation display can see all the screens only in the right side area of the front cover 12, it is possible to view the entire periphery of the navigation display by moving the head or the line of sight at a narrow angle. Therefore, even if the navigation display is switched to the wide area display, it is possible to see even a portion that does not fall within the normal visual field.

Since the Fresnel lens 26 is used as the optical system, the navigation screen can be enlarged and displayed with little distortion.

Further, since the space is formed on the left side of the back surface of the front cover 12, the circuit of the liquid crystal display device 13 can be effectively accommodated.

[0052]

Example 1 Screen size of the liquid crystal display device 13 ... 5 inches Focal length of Fresnel lens 26 ... f = 250 mm Distance from Fresnel lens 26 to liquid crystal display device 13 ...
137 mm Distance from Fresnel lens 26 to virtual image 27 image formation position ...
303 mm Distance from Fresnel lens 26 to virtual image 4 image formation position ... 4
5mm Distance between navigation display and meter display ... 258
mm = 303mm-45mm Enlarged navigation display size ... Equivalent to about 11 inches (about 2.2 times) Distance from eye point to virtual image 4 ... 900mm Meter display size on front cover ... About 8.12 inches Considerable

[0053]

Second Embodiment of the Invention FIG. 7 shows a vehicle display device according to a second embodiment of the present invention. In addition, the same or equivalent portions as those in the first embodiment will be described with the same reference numerals.

In the vehicle display device according to the second embodiment,
As an optical system, a back-side reflecting mirror 28 that can change the arrangement angle of the liquid crystal display device 13 is provided in the Fresnel lens 2
6 and the liquid crystal display device 13 which is disposed above the storage case 14 with the display surface facing the lower surface.

Next, the operation of the second embodiment will be described.

In the vehicle display device according to the second embodiment,
In addition to the operation of the first embodiment, the arrangement position and the arrangement angle of the liquid crystal display device 13 can be changed by the back side reflecting mirror 28. For example, as in the second embodiment, the storage case 14 It is possible to set the position of the liquid crystal display device 13 to a position with good space efficiency by, for example, disposing the display surface on the lower surface side at the upper position.

The other structure and operation are substantially the same as those in the first embodiment, and the description thereof will be omitted.

[0058]

Third Embodiment of the Invention FIG. 8 shows a vehicle display device according to a third embodiment of the present invention. In addition, the same or equivalent parts as those in the first and second embodiments will be described with the same reference numerals.

In the vehicle display device according to the third embodiment,
As an optical system, a back side magnifying reflection mirror 29 that can change the arrangement angle of the liquid crystal display device 13 is arranged at the upper position of the Fresnel lens 26 and the storage case 14 with the display surface facing the lower surface. It is arranged at a position between the liquid crystal display device 13.

The Fresnel lens 26 used in the first and second embodiments is omitted.

Next, the operation of the third embodiment will be described.

In the vehicle display device according to the third embodiment,
In addition to the operations of the first and second embodiments, the back side magnifying reflecting mirror 29 reflects while enlarging the navigation screen and the TV screen of the liquid crystal display device 13, so that the Fresnel lens 26 which is a magnifying lens is omitted. can do. Therefore, the number of parts can be reduced.

The other structure and operation are substantially the same as those in the first and second embodiments, and the description thereof will be omitted.

Although the first to third embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to the first embodiment,
Even if the design is changed without departing from the gist of the present invention, it is included in the present invention.

For example, in the first embodiment, the navigation screen is made transparent in the area on the right side of the front cover 12, and the engine speed display is reflected and displayed. The present invention is not limited to this, and the navigation screen or the TV screen may be transparently displayed at all times.

Further, in the second embodiment, the liquid crystal display device 1 is arranged with the display surface facing the lower surface at the upper position of the storage case 14.
However, the present invention is not limited to this, and the display surface is provided on the back-side reflecting mirror 28 at a position where space efficiency is good, such as a lower position of the storage case 14 or a side position. You may make it arrange | position toward it.

Furthermore, in each of the first to third embodiments, the liquid crystal display device 13 is used as the navigation display device. Any navigation display device may be used as long as it is small enough not to reduce space efficiency.

[0068]

As described above, according to the first aspect of the present invention, the meter display of the fluorescent display tube is reflected by the reflecting mirror and is formed as a virtual image at a distant position. For this reason, it is possible to display a wide viewing angle near the hand with sufficient brightness so that it can be seen from any angle, and the meter display can be visually recognized in an instant while the vehicle is traveling.

The navigation screen displayed on the navigation display device is enlarged by the optical system, and the virtual image forming position is located farther than the virtual image position of the fluorescent display tube. Therefore, the navigation screen can be displayed in a large size, and the road on the fine map can be visually recognized in detail. Moreover, the image formation position of the virtual image can be set independently in the distance, and by setting the focal length close to the outside scenery, you can compare the outside scenery seen through the window glass and check the position several times. However, the focus adjustment is easy and the visibility is good.

Therefore, whether the meter display or the navigation display is performed, the driver of the vehicle can visually recognize these displays in good condition.

According to the second aspect of the invention, the tachometer display and the navigation screen display by the navigation display device among the meter displays by the fluorescent display tube are switched to the same area of the reflecting mirror. Is displayed.

Therefore, the area of the reflecting mirror can be effectively used, and these displays can be visually recognized efficiently.

And, according to the third aspect,
Since a Fresnel lens is used in the optical system,
The navigation screen can be enlarged and displayed with little distortion.

According to the fourth aspect of the present invention, since the rear surface side reflecting mirror for changing the arrangement position and the arrangement angle of the navigation display device is provided in the optical system, the navigation display device is provided. It is possible to set the position of 1 to an upper position with good space efficiency.

Further, according to the fifth aspect of the present invention, the arrangement position and the arrangement angle of the navigation display device can be changed so that the virtual image forming position is located farther than the virtual image position of the fluorescent display tube. Since the magnifying mirror is provided in the optical system, the position of the navigation display device is set to a good space efficiency, for example, the magnifying lens is omitted while setting the position to the upper position to reduce the number of parts. Furthermore, it has a practically useful effect that the space efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a side cross-sectional view illustrating a vehicle display device according to a first embodiment of the present invention and illustrating a configuration of a main part.

FIG. 2 is a top view of a main part of the vehicle display device according to the first embodiment of the present invention.

FIG. 3 is a front view of the fluorescent display tube of the fluorescent display device, showing the vehicle display device according to the first embodiment of the present invention.

FIG. 4 is a front view showing the vehicular display device according to the first embodiment of the present invention, showing how the meter display is reflected and displayed on the front cover.

FIG. 5 shows a vehicle display device according to a first embodiment of the present invention, in which a meter display is reflected on a front cover,
It is a front view which shows a mode that the navigation display was made transparent and was displayed.

FIG. 6 is a block diagram illustrating the vehicle display device according to the first embodiment of the present invention and illustrating the concept of the circuit configuration.

FIG. 7 is a side sectional view showing a vehicle display device according to a second embodiment of the present invention and illustrating a configuration of a main part.

FIG. 8 is a side cross-sectional view showing a vehicle display device according to a third embodiment of the present invention and illustrating a configuration of a main part.

FIG. 9 is a side cross-sectional view of a main part showing a conventional vehicle display device.

FIG. 10 is a front view showing another conventional vehicle display device and showing an example of a meter display.

FIG. 11 is a front view showing another conventional vehicle display device and showing an example of a navigation display.

[Explanation of symbols]

11 Fluorescent Display Tube 12 Front Cover (Reflecting Mirror) 13 Liquid Crystal Display (Navigation Display) 25 Switching Control Section Optical System 26 Fresnel Lens 28 Back Side Reflecting Mirror 29 (Back Side) Enlarging Mirror

Claims (5)

[Claims] 1. A reflective mirror having transmissivity, a fluorescent display tube which is disposed above the reflective mirror and forms a virtual image at a distant position by reflecting a meter display on the reflective mirror.
A navigation display device, which is disposed on the back side of the reflecting mirror and displays a navigation screen, is provided between the navigation display device and the reflecting mirror, and the navigation screen is enlarged and the virtual image forming position is set to the virtual image forming position. A vehicular display device having an optical system that is located farther than a virtual image position of a fluorescent display tube. 2. The tachometer display of the meter display by the fluorescent display tube and the navigation screen display by the navigation display device are switched and displayed in the same area of the reflecting mirror. The vehicle display device described. 3. The optical system according to claim 1, wherein the optical system includes a Fresnel lens.
And the display device for a vehicle described in 2. 4. The display device for a vehicle according to claim 1, wherein the optical system is provided with a rear surface side reflecting mirror capable of changing an arrangement angle of the navigation display device. 5. The magnifying mirror is provided in the optical system so that the arrangement angle of the navigation display device can be changed and the virtual image forming position is located farther than the virtual image position of the fluorescent display tube. The display device for a vehicle according to any one of claims 1 to 4, which is characterized.